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近滨海缺水盐渍区冬小麦返青期灌水试验表明 ,当每公顷浇水量为 750 m3时 ,0 cm～ 2 0 cm耕层土壤 HCO- 3 ,Cl- ,SO2 - 4,Ca2 +,Mg2 +,Na++K+盐离子含量分别下降3.50 % ,50 .0 4 % ,67.76% ,41 .1 5% ,38.89%和 2 9.59% ,淋脱量大小顺序为 :SO2 - 4>Cl- >Ca2 +>Mg2 +>Na++K+>HCO- 3 ,耕层脱盐率 42 .1 7%。浇水处理 ,返青期灌水 1 0 d后单株分蘖数与干物重分别比对照增加 1 .2条 ,0 .0 9g;灌浆期绿叶面积增加 3.95cm2 ;成熟期株高、穗数、穗粒数和千粒重分别比对照增加 6.9cm,1 80 .0万 /hm2 ,3粒和 2 .2 3g,增产68.40 % ,其中分蘖数、穗数和产量与对照的差异达极显著水平 ,灌浆期单株绿叶面积达显著水平。
Nearly the coastal salinization area winter wheat regreening irrigation experiments showed that when the irrigation water per hectare 750 m3, 0 cm ~ 20 cm topsoil HCO- 3, Cl-, SO2 - 4, Ca2 +, Mg2 + , Na + + and K + decreased 3.50%, 50.04%, 67.76%, 41.1 5%, 38.89% and 2 9.59%, respectively. The order of SO2-4> Cl-> Ca2 +> Mg2 +> Na ++ K +> HCO-3, and the rate of topsoil desalination was 42.1 7%. The number of tillers and dry matter weight per plant increased by 1.2% and 0.99g respectively after watering and returning greening period. The area of green leaf increased by 3.95cm2 during grain filling period. The plant height, spike number, The numbers and thousand-kernel weights increased by 6.9cm, 1.8 million / hm2, 3 and 2.23g, respectively, and the yield was increased by 68.40%. The difference between tiller number, panicle number and yield was extremely significant. Green leaf area reached a significant level.